Electrical device and circuit.



iNVENTOR PATENTED APR. 17, 1906.

R. 'J. HEWETT. ELECTRICAL DEVICE AND CIRCUIT.

APPLICATION FILED JUNE 2. 1905.

WITNESSES:

UNITED STATESPATENT orricn.

ROBERT J. HEVVETT, OF WESTFIELD, NEW JERSEY, ASSIGNOR TO THE HALL SIGNAL COMPANY, A CORPORATION OF MAINE.

ELECTRICAL DEVICE AND CIRCUIT.

To all whom it may concern:

Be it known that 1, ROBERT J. HEWETT, a

citizen of the United States, and a resident of Westfield, county of Union, and State of New Jersey, have invented certain new and useful Improvements in Electrical Devices and Circuits, of which the followingis a specificati on.

This invention relates to improvements in electrical devices and circuits, and more particularly to such as are adapted and designed for use in connection with electric signaling systems for railways.

The invention seeks to provide an ar rangement whereby an economy of current consumption may beefi'ected in operating a relay.

The invention is more particularly useful in connection with what is known as a trackrelay.

In track-signal work the term track-relay is generally applied to the relay located at the entering end of a track-section. It is energized or responsive when there is no train in the tracksection and is deenergiz'ed or made unresponsive by the presence of a train in the track-section. It is used in connection with signals normally at danger and also in connection with signals normally at clear or safety position.

The term clearing-relay is generally applied to the relay located at the exit end of a I track-section and is used in connection with signals normally at danger. The clearingrelay is de'energized or unresponsive when there is no train in the track-section and is energized, or made res onsive by the presence of a train in the traclE-section.

The accompanying drawing, forming part of this specification, shows one block of a signaling system having the signal normally at .safety.

The track-relays associated with the sys tem show the inventionin three different forms. 1

Referring now more particularly to the drawing, 1, 2, and 3 are subsections of the track-section or block, having three 's'ta tions A, B, and C. The signal 4, which guards the section or block, is normally at safety. The magnet 5, connected in circuit with the battery 6 and circuit-controller 7, represents the motor-controlling magnet for the signal. Magnet-coils 8 and 12 are the magnet-coils of the track-relay at station A.

Specification of Letters Patent.

I Application filed June 2, 1905. Serial No. 263,501.

' circuit.

Patented. April 17, 1906.

9 and 10 are the lead-wires from subsection 1 to this relay. Magnet-coil 8 is connected on one side with wire 9 and is connected on its other side with wire 10 through movable contact 11. Magnet-coil 12 is connected on one side by wire 13 with wire 9 and is connected on its other side by wire 14 and movable contact 15 with wire 10. Movable contacts 11 and 15 constitute the circuit-changer. When this circuit-changer is in the position shown in the drawing, magnetcoil 8 is included in the track-circuit and magnet-coil 12 is excluded therefrom. I/Vhen the circuit-changer is in its other position, magnet-coil 8 is excluded from thetrack-circuit and magnetcoil 12 is included in said circuit. In this latter position contact 1'1 will be open and contact 15 will be closed. The circu t-changer maybe operated in any suitable manner. At station A it is shown as mechanically conner'ted with and operated by the operating rod 16 of signal a. At the eXit end of subsection 1 are the lead-Wires 17 and 18, which includebattery 19 and movable contacts 20 and 21.

22 is the armature of magnet coil 12. When magnet-coil 12 is energized, armature '22 is attracted, so as to pick up circuit-controll er 7 and lift it into the field of its magnetcoil 8 and close the circuit through magnet 5. Magnet-coil 8 has a relatively high resistance-say eight ohmsand magnet coil 12 has a relatively low resistancesay one ohm.

In the normal condition of the circuitsthat is, when there is no train in the block signal 4 will be at safety and coil 8 will be included in the circuit of battery 19, so that the battery consumption will be reduced and merely sufiicient to enable coil 8 to hold up the circuit-closer 7, as shown in the drawing. When a train enters subsection 1, itshunts coil 8, thereby opening at '7 the circuit through magnet 5 and causing signal 4 to go to dan er. The circuit-changer is thereupon slnfted. so as to exclude coil 8 from the track-circuit, but indlude coil 12 in the track- Coil 12 of course is not energized until the train has passed beyond the block or track-section guarded by signal 4. When circuit.

'24 is connected full strength of battery 19. to be utilized in closing circuit through magnet 5 at circuitcontroller 7. In the movement of the signal 4 to safety the circuit-changer is shifted to its normal position, so as to include coil 8 in the track-circuit and exclude coil 12. Coil 8 being now energized maintains circuit-controller 7 in its hold-up or closed position and coil 12, being deener ized, drops its armature.

It is preferable t at coil 12 be. excluded from the track-circuit when coil 8 is included therein; but it would not be a departure from the invention to permit coil 12 to remain in the track-circuit with coil 8 when the si nal goes to safety instead of excluding coi 12 at this time.

It will be seen that when coil 12 is initially energized circuit controller 7 is picked up and that when coil 8 is energized circuit-controller 7 is held'up. It will also be seen that the energization of coil 8 initiates the movement of the circuit-changer (contacts 11 and 15) to the osition in which coil 8 is included in the trac +circuit. It will also be seen that the energization'of coil 12 initiates the movement of signal 4 to clear position, the energization of coil8 serving to maintain the signal in clear position. It will also be seen that when coil 8 is dener izedcircuit-controller 7 drops from its he d-up osition to its pick-up position and that the deener ization of (3011 8 initiates the movement 0 the, signal to danger position and also initiates the movement of the circuit-changer to the.

position which excludes coil 8 from the track- The track-relay at station B controls the signal 4 through the track-circuit of subsection 1 by means of the circuit-controllers and 21, connected in this trackcircuit, as heretofore described. 22 and 23 are the wires leading from the rails of subsection 2 to the track-relay. High resistance magnet on one side to wire 22 and on its other side by wire 25 through moving contact 26 to wire 23. Low-resistance magnet 27 is connected by wire 28 to wire 23 and on its other side through wire 29, moving contact 30 and Wire 31 to wire 22. A

Magnet 24 is included ina local circuit which includes wire 31, battery 32, wire 33, circuit-controller 34, and wire 35. Circuitcontroller 34 is operated by coil 27. Moving contacts 26 and 30 constitute the circuitchanger for the relay at station B and when attracted by coil 24 occu ies the position shown in the drawing, at w 'ch time they include coil 24 in the track-circuitand exclude coil 27. When they are in the reverse position, they exclude coil 24 and include COll 27.

The coils and contacts are shown in their normal position at station B. At this time contacts 20 and 21 are closed, thereby closing the track-circuit of subsection 1. Coil 24 is energized and contacts 26 and 30, which con- 24. Coil 27 is deenergized and loca eludes coil 24 in the track-circuit.

by coil circuit of battery 32 is-open at circuit-controller 34.

stitute the circuit-changer, are held u The track-circuit of the track-relay for station B includes the rails of subsection 2, battery 35, wire 36, circuit-controller 37, and. wire 38. When coil 24 is deenergized, as by 'a train on subsection 2, contacts 26 and 30 move from their hold-up position into their pick-up position and track-circuit of subsection 1 is broken at contact 20. The change in the position of the circuit-changer excludes coil 24 and includes coil 27 therein, this latter circuit extending from wire 22, through Wire 31, contact 30, wire 29, coil 27 to wire 23.

When current again flows through the track-circuit of subsection 2, coil 27 is energized, thereby closing at circuit-controller 34 the local circuit through battery 32 and coil 24. Coil 27 being of loW resistance insures the utilization of am le current to reliably close circuit-control er 34. Current from battery 32 thereupon energizes coil 24, fioW- ing from battery 32 through wire 33, circuitcontroller 34, Wire 35, 0011 24, and wire 31 back to battery. Coil 24 lifts contacts 26 and 30 into their hold-up position and there holds them. This change in the position of contacts 26 and 30 excludes coil 27 and in- It will be seen that the energization of coil 27 initiates the movement of the circuit-changer (contacts 26 and 30) from their pick-up position to their hold-up position, coil 27 working through the agency of the local circuit and coil 24 in eflecting this result. When coil 27 is thus excluded from the track-circuit, it drops contacts 34 and 21, contact i34 breaking the local circuit of battery 32 and contact 21 closing the last break in the track-section of subsection 1. It will be seen that coils 24 and 27 bear the same relation to their trackcircuit as do coils 8 and 12 to their track-circuit and thatthe two relays at stations A and B effect the same ultimate results, although in a different manner and by means somewhat difierent.

At station C the track-relay is shown in a second modified. form. In this case the lowresistance coil 39 is connected on one side to wire 40, leading to one rail of subsection 3, and on its other side through Wire 41, contact 42, wire 43 to Wire 44, leading to the other rail of subsection 3. 45 is the battery of this track-circuit. High-resistance coil 46 IIS is connected on one side to wire 44 and on its other side to wire 41. In this arrangement coils 39 and 46 are wound on the sarnecore. When the parts are in their normal condition,

,as shown in the drawing, current flows through wire 40, low-resistance coil 39, highresistance coil 46, and Wire 44 through the track-rails and battery 45. The relay is energized and contact 42 is open and is held in its hold-up, position by the relay, but more a gized.

. troller 37.

particularly by the high-resistance'coil 46 of the circuit. When the relay is thereafter en ergized,as by a train moving out of subsec-II tion 3, current flows first through low-resist ance coi-139,.so that this coil beln energized moves the contact 42 from its pic -up to its hold-u position. This breaks the shunt around coil 46, so that both coils are there-v upon included in the circuit and contact 4 2 is' held-in its holdup position by bothcoils39' and 46. Contact 42 constitutes the circuitchan er for this relay, doing th'e'workotjshiffl ing t e relay connection 'from one of low resistance to one of high1esistance just as do the circuit-changers at stations A-andB.- Relay at station C operates u on signal 4 through the agency of the trac -circu1ts for .1 subsections 1 and 2 ,the track-circuit of sub-,

section. 2 being operated-through circuit-con- ,While I have shown my invention i ployed 'as atrack-relay, it 1s to be observed Y that it may also be employedas a clearing-repossess the same advantages. 4 1 e What I claim, and desire to secure by Let:

lay, where it will operate in the same way and ters Patent, is-

1. .The combination of a circuit; 'with two magnet-coils, one of high resistance and one of low resis tance; a circuit-changer connected with said circuit and so arranged tha-twheh in one position itexcludes the high-resistance coilin said circuit; and a circuit-controller arranged to be picked up when the'low resistance coil is initially energized and to be' held up when the high-resistance coil is ener 2. The combination of a circuit; with tWo} magnet-coils, one of high resistance andone of low resistance; a circuit-changer connected with said circuit and so arranged that when in-one position it excludes the high-resistance coil from saidcircuit but includes 13l16l0W1',6.-.

sistance coil in said circuit;"and wheniin its,

other position it includes the high-resistance coil in said circuit; and a circuitcontroller arranged to be picked up when the low-resistance coil is initially energized and to be held up when the high-resistance coil is ener- 7 gized, the movement of said circuit-changer by the energization o the low-resistance coil,

to its last-mentioned osition being initiated 3 and. the movement of said circuit-changer to its first-mentioned position being initiated b i a the deenergization of the high-resistance .coi 5 3. The combination of a circuit; with two 3 magnet-coils, one of high resistance and one of low resistance a circuit-changer connecteawiaaad.a@m nd arranged that ..w-hen inpnepositicn it excludes the high-ref sistancei coil from said; circuit but-includes @the-Ilow-resistance;coil-in said circuit; and when; in its, other positionit includes thehighresistance,coil inisaid circuit, and excludes ,the low-iresistancecoil from said circuit; and

a circuit-controller; arranged to-be picked up.

, when the low resistance coil is energized and toibe held upwhen the high-resistance coil is ene g zed "f. A ,..The 'c'onibinationofa circuit; with two magnet coilsi one of high resistance and one of low resistanceya circuit-changer connect ,ed ;with;. said,,circuit and-so arranged that wheninoneposition it excludes the high-resistance-coilgfrom said circuit but includes the loweresistancecoil in said circuit; and

@wheuin its otherposition it includes the highresistance %c"oil inrsaid circuit andexcludes the .lOW-IGSlStflHQQzGOll from said ClI'Glllt, and a circuit-controller arranged to be picked up whenythe low-resistance coil is energized and to be held, upwhcn the highqesista'nce coil is energized, theamovement of said circuitchangerto its ;last-mentionedposition being initiated byv theenergization of the low-resistance. coil, andthe movement of said circuit-changer :to its first-mentioned position being initiated by high-resistance coil. g 1

15.: The :combination ofa track-circuit; with a signal}, two magnet-coils'one of high resistance and one of low resistance; the lowresistance 1 coil, when first energized initiattion, and the-highres istance fcoil when ener' lgized' operating" to maintain .the signal in ediwith saidfcircuit and arrange to cut out thehi h-resistance coil after the latter has b66115: eenergized and to'cut'in the high-reisistanceicoil after the low-resistance COll has and: the: high resistance coil when energized opeIra-tingtom'aintain the signal in clear position and a. circuit-changer connected with said circuit and arranged to cut in the low-' resistance coil"v and-to cut outthe high-resistthe deenergization of the 4 ing. the movement of the signal to clear posi- I coil from saidcircuit but includes the low resistance coil in said circuit; and when in its other position it includes the high-resistance an'cezooil after the latter hasbeen denergized v and to cut out the low-resistance coil and to out in the hi h-resistance coil after the low resistance coi has been energized.

7. The combinationofatrack-circuit;with a signal; two magnet-coils, one of high re sistance and one of low resistance; a circuit-controller arranged to be picked up b the coil of low resistance and held up by the r o 5 "clear position ;land acircuit' chan' er connectr coil of high resistance; and a circuit-changer. operated by the movement of the signal from,

one position to another, said circuit-changer acting when in one position to exclude the high-resistance coil and includethe low'-re sistance coil in the circuit, and when in its other position acting to include said highre sistance coil in the circuit.

' 8. The combination of a track-circuit with" a signal; two n1agnet-coils,;oneof high resistance and one of low resistance; a circuit-controllerarranged to be picked up bythe coil of low resistance and held up by the coil'of high resistance; and a circuit-changer operated by the movement'of the signal from onepos'ition to another, said circuit-changer. acting wheninone position to exclude. the high-resistance coil an to include said high-resistance coil in the circuit and exclude the low-resistance coil.

9. The combination :of a circuit; withtwo magnet-coils, one of high resistance and one of low resistance; a circuitchanger connected with said circuitand so arranged that when inone position it excludes the high-resistance coil from said circuit but-includes the low-resistance coil in saidcircuit, and

when in itsother position it includes thehighresistance coil in said circuit; a circuit-con troller arranged to be held up by the high-resistance coil; and an armature for the-lowup said circuit-controller.

resistance coil arran ed to mechanically pick 10. The combination ofa circuit; with two magnet-coils, one of high resistancean'd I one of low resistanceyacircuit-changer con nected withsaid circuitand so arrangedthat when in one position it excludes the high-resistance coil from said circuit but includes the low-resistance coil in said circuit; and when 1n its other position it includes the high resistance coil in s'aid'circuit; a circuit-controller arranged to be held up by the high+resistance coil; and an armature for the lowresistance coil arranged to mechanically pick up said circuit-controllenthe movement of said circuitrchanger to its last-mentioned position being initiated by the, energization of j two magnetcoils, oneof-high resistance and include the low-resistance coil in thecircuit, and when in its otherposition acting one of low resistance; a circuit-controller arranged to be held up by the high-resistance 'low resistance when the signal isat danger.

12. The combination 0 a track-circuit including a source of energy; with a signal;

two magnet-coils; one of high resistance and Zone of low resistance a circuit-controller arranged to be held up by the high-resistance coil; an armature for the low resistance coil arranged to mechanically pick up said circuit-controller; and a circuit-changer operated by'the signal and actin to change the connection of said coils with t he track-circuit from one of high resistance when the signal is in clear position to one of low resistance when the signal is at danger.

13. The combination of a track-circuit including a source of energy; with a signal; two magnet-coils, one of high resistance and one of low resistance; a circuit+controller arranged to be held up by the high-resistance coil; an armature for the low-resistance coil arranged to mechanically ick up said circuitcontroller; and a circuit-c anger acting to inis in clear position and acting to exclude the high-resistance coil and include the low-resistance coil in the circuit when the signal is at danger.

14. The combination of a track-circuit 1ncluding. a source of energy; with a. signal; two magnet-coils one ofhlgh resistance and one of low resistance; a circuit-controller arranged to beheld up by the high-resistance coil; an armature for the low-resistance coil arranged to mechanically ick up said circuitccntroller and a circuit-c anger o erated by the signal and acting to include t e high-resistance coil when the s' nal is in clear position and acting to excludet e high-resistance coil and include the low-resistance coil in the circuit when the signal is at danger.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

NICHOLAS M. GooDLETT, Jr., W. H. LANE.

.clude the high-resistance coil when the signal 

